1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * (C) Masami Komiya <mkomiya@sonare.it> 2005
4 *  Copyright 2009, Robin Getz <rgetz@blackfin.uclinux.org>
5 */
6
7#ifndef __DNS_H__
8#define __DNS_H__
9
10#define DNS_SERVICE_PORT 53
11#define DNS_TIMEOUT      10000UL
12
13/* http://en.wikipedia.org/wiki/List_of_DNS_record_types */
14enum dns_query_type {
15	DNS_A_RECORD = 0x01,
16	DNS_CNAME_RECORD = 0x05,
17	DNS_MX_RECORD = 0x0f,
18};
19
20/*
21 * DNS network packet
22 */
23struct header {
24	uint16_t	tid;		/* Transaction ID */
25	uint16_t	flags;		/* Flags */
26	uint16_t	nqueries;	/* Questions */
27	uint16_t	nanswers;	/* Answers */
28	uint16_t	nauth;		/* Authority PRs */
29	uint16_t	nother;		/* Other PRs */
30	unsigned char	data[1];	/* Data, variable length */
31} __attribute__((packed));
32
33void dns_start(void);		/* Begin DNS */
34
35#endif
36